Piston Ring 1.Engine piston ring, auto piston ring 2.Different treatment:Phosphated, Nitrided etc. 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Komatsu 6D105 engine:1.piston ring material :nodular iron, cast iron ... ), 3408(8N0822),D346, D343, D348, D398(1W5105),CAT145, CAT170Komatsu piston ring4D92, 4D94, 4D95, S4D95, S6D95, 6D95, SA1D95,6D102, S6D102, S6D105, 6D108, S6D108 ...